/*
  页脚样式 - 现代企业网站页脚设计
  基于2025年最佳实践：深色背景、响应式、高对比度、流畅交互
  文件: css/footer.css (v2.0)
*/

/* ====== CSS变量定义 ====== */
:root {
    --footer-bg-primary: #0a1628;
    --footer-bg-secondary: #060f1e;
    --footer-bg-tertiary: #030914;
    --footer-text-primary: rgba(255, 255, 255, 0.92);
    --footer-text-secondary: rgba(255, 255, 255, 0.65);
    --footer-text-muted: rgba(255, 255, 255, 0.45);
    --footer-accent-blue: #3b82f6;
    --footer-accent-cyan: #06b6d4;
    --footer-border-color: rgba(255, 255, 255, 0.08);
    --footer-border-hover: rgba(59, 130, 246, 0.3);
    --footer-card-bg: rgba(255, 255, 255, 0.03);
    --footer-card-bg-hover: rgba(255, 255, 255, 0.07);
    --footer-radius-sm: 8px;
    --footer-radius-md: 12px;
    --footer-radius-lg: 16px;
    --footer-shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.15);
    --footer-shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.25);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====== 全局布局修复（解决分类页等页面页脚异常）====== */
.site-footer-new,
.site-footer-new * {
    box-sizing: border-box;
}

.site-footer-new {
    width: 100%;
    max-width: 100vw;
    overflow: hidden;
    position: relative;
}

/* ====== 页脚主容器 ====== */
.site-footer-new {
    position: relative;
    z-index: 10;
    color: var(--footer-text-secondary);
    background: linear-gradient(180deg, var(--footer-bg-primary) 0%, var(--footer-bg-secondary) 100%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    line-height: 1.7;
    overflow: hidden;
}

/* 装饰性背景图案 */
.site-footer-new::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--footer-accent-blue) 20%,
        var(--footer-accent-cyan) 50%,
        var(--footer-accent-blue) 80%,
        transparent 100%
    );
    opacity: 0.6;
}

.site-footer-new::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
    border-radius: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

/* ====== 主内容区：菜单网格 + 联系方式 ====== */
.footer-main {
    padding: 64px 0 48px;
    position: relative;
}
.footer-main .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    box-sizing: border-box !important;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 4px;
    align-items: start;
    position: relative;
    z-index: 1;
}

/* 动态菜单列 */
.footer-nav-column {
    animation: fadeInUp 0.6s ease-out backwards;
}
.footer-nav-column:nth-child(1) { animation-delay: 0.1s; }
.footer-nav-column:nth-child(2) { animation-delay: 0.15s; }
.footer-nav-column:nth-child(3) { animation-delay: 0.2s; }
.footer-nav-column:nth-child(4) { animation-delay: 0.25s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.footer-column-title {
    margin: 0 0 20px;
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 1.5px;
}
.footer-column-title i {
    color: var(--footer-accent-cyan);
    font-size: 14px;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5));
}

.footer-toggle {
    margin-left: auto;
    background: transparent;
    border: 1px solid var(--footer-border-color);
    color: var(--footer-text-muted);
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    transition: all var(--transition-fast);
    display: none;
}
@media (max-width: 768px) {
    .footer-toggle { display: flex; align-items: center; gap: 4px; }
    .footer-toggle:hover {
        border-color: var(--footer-accent-blue);
        color: #fff;
        background: rgba(59, 130, 246, 0.1);
    }
    .footer-toggle.active {
        transform: rotate(180deg);
    }
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links li {
    max-width: 100%;
    overflow: hidden;
}

.footer-links li a {
    color: var(--footer-text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: all var(--transition-smooth);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
    line-height: 1.5;
    padding: 2px 0;
    position: relative;
    word-break: break-word;
}
.footer-links li a::before {
    content: '';
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--footer-accent-blue), var(--footer-accent-cyan));
    transition: width var(--transition-smooth);
    position: absolute;
    left: 0;
    bottom: 0;
}
.footer-links li a:hover {
    color: #ffffff;
    transform: translateX(4px);
    padding-left: 8px;
}
.footer-links li a:hover::before {
    width: 24px;
}

/* ====== 联系方式列（与菜单列统一样式）====== */
.footer-contact-section {
    animation: fadeInUp 0.6s ease-out backwards;
    animation-delay: 0.3s;
}

.footer-contact-section .contact-card {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    backdrop-filter: none;
    transition: all var(--transition-fast);
    position: static;
    overflow: visible;
}

.footer-contact-section .contact-card::before {
    display: none;
}

.footer-contact-section .contact-card:hover {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    transform: none;
}

.contact-card-title {
    margin: 0 0 20px;
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card-title i {
    color: var(--footer-accent-cyan);
    font-size: 16px;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5));
}

.contact-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--footer-text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 400;
    transition: all var(--transition-fast);
    padding: 0;
    border-radius: 0;
    background: transparent;
}
.contact-item:hover {
    color: var(--footer-accent-cyan);
    background: transparent;
    transform: translateX(4px);
}
.contact-item i {
    color: var(--footer-accent-blue);
    width: 18px;
    text-align: center;
    font-size: 14px;
    transition: all var(--transition-fast);
}
.contact-item:hover i {
    color: var(--footer-accent-cyan);
    transform: scale(1.1);
}

.qrcode-wrap {
    display: flex;
    justify-content: flex-start;
    margin-top: 4px;
}

.qrcode-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 0;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    transition: all var(--transition-fast);
}
.qrcode-item:hover {
    transform: scale(1.03);
    opacity: 0.9;
}
.qrcode-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.qrcode-item span {
    font-size: 11px;
    color: #374151;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ====== 线下服务中心 ====== */
/* ====== 线下服务中心（完全隔离样式）====== */
#branches-isolated,
#branches-isolated * {
    box-sizing: border-box !important;
}

#branches-isolated {
    width: 100% !important;
    max-width: 100% !important;
    border-top: 1px solid var(--footer-border-color) !important;
    padding: 40px 0 !important;
    position: relative !important;
    background: rgba(0, 0, 0, 0.2) !important;
    overflow: hidden !important;
}

#branches-isolated .branches-container {
    max-width: 1280px !important;
    width: 100% !important;
    margin: 0 auto !important;
    padding: 0 32px !important;
}

#branches-isolated .branches-section-title {
    margin: 0 0 28px !important;
    font-size: 17px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    text-transform: uppercase !important;
    letter-spacing: 1.5px !important;
}

#branches-isolated .branches-section-title i:first-child {
    color: var(--footer-accent-cyan) !important;
    font-size: 18px !important;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5)) !important;
}

#branches-isolated .branches-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)) !important;
    gap: 18px !important;
    width: 100% !important;
}

#branches-isolated .branch-card {
    background: var(--footer-card-bg) !important;
    border: 1px solid var(--footer-border-color) !important;
    border-radius: var(--footer-radius-sm) !important;
    padding: 20px 22px !important;
    transition: all var(--transition-smooth) !important;
    cursor: pointer !important;
    position: relative !important;
    overflow: hidden !important;
    width: 100% !important;
    max-width: 100% !important;
}

#branches-isolated .branch-card::after {
    content: '' !important;
    position: absolute !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 2px !important;
    background: linear-gradient(90deg, var(--footer-accent-blue), var(--footer-accent-cyan)) !important;
    transform: scaleX(0) !important;
    transition: transform var(--transition-smooth) !important;
}

#branches-isolated .branch-card:hover {
    background: var(--footer-card-bg-hover) !important;
    border-color: var(--footer-border-hover) !important;
    box-shadow: var(--footer-shadow-soft) !important;
    transform: translateY(-2px) !important;
}

#branches-isolated .branch-card:hover::after {
    transform: scaleX(1) !important;
}

#branches-isolated .branch-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    margin-bottom: 12px !important;
    width: 100% !important;
}

#branches-isolated .branch-header i:first-child {
    color: var(--footer-accent-blue) !important;
    font-size: 16px !important;
}

#branches-isolated .branch-header strong {
    font-size: 15px !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    letter-spacing: 0.3px !important;
}

#branches-isolated .branch-toggle-icon {
    color: var(--footer-text-muted) !important;
    font-size: 12px !important;
    cursor: pointer !important;
    transition: all var(--transition-fast) !important;
}

#branches-isolated .branch-card:hover .branch-toggle-icon {
    color: var(--footer-accent-cyan) !important;
    transform: rotate(180deg) !important;
}

#branches-isolated .branch-address {
    margin: 0 !important;
    font-size: 13.5px !important;
    color: var(--footer-text-muted) !important;
    line-height: 1.65 !important;
    transition: color var(--transition-fast) !important;
    width: 100% !important;
}

#branches-isolated .branch-card:hover .branch-address {
    color: var(--footer-text-secondary) !important;
}

.footer-branches-section {
    border-top: 1px solid var(--footer-border-color);
    padding: 40px 0;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
}

.branches-section-title {
    margin: 0 0 28px;
    font-size: 17px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 14px;
}
.branches-section-title i {
    color: var(--footer-accent-cyan);
    font-size: 18px;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5));
}

.branches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}
.branch-card {
    background: var(--footer-card-bg);
    border: 1px solid var(--footer-border-color);
    border-radius: var(--footer-radius-sm);
    padding: 20px 22px;
    transition: all var(--transition-smooth);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.branch-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--footer-accent-blue), var(--footer-accent-cyan));
    transform: scaleX(0);
    transition: transform var(--transition-smooth);
}
.branch-card:hover {
    background: var(--footer-card-bg-hover);
    border-color: var(--footer-border-hover);
    box-shadow: var(--footer-shadow-soft);
    transform: translateY(-2px);
}
.branch-card:hover::after {
    transform: scaleX(1);
}

.branch-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.branch-header i:first-child {
    color: var(--footer-accent-blue);
    font-size: 16px;
}
.branch-header strong {
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.3px;
}
.branch-toggle-icon {
    color: var(--footer-text-muted);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.branch-card:hover .branch-toggle-icon {
    color: var(--footer-accent-cyan);
    transform: rotate(180deg);
}

.branch-address {
    margin: 0;
    font-size: 13.5px;
    color: var(--footer-text-muted);
    line-height: 1.65;
    transition: color var(--transition-fast);
}
.branch-card:hover .branch-address {
    color: var(--footer-text-secondary);
}

/* ====== 友情链接 ====== */
.footer-friends {
    border-top: 1px solid var(--footer-border-color);
    padding: 24px 0;
    background: rgba(0, 0, 0, 0.15);
}
.footer-friends .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

.friends-wrap {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}
.friends-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--footer-text-secondary);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-size: 12px;
}

.friends-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 22px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.friend-link {
    color: var(--footer-text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: all var(--transition-fast);
    position: relative;
    padding-bottom: 2px;
}
.friend-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--footer-accent-cyan);
    transition: width var(--transition-smooth);
}
.friend-link:hover {
    color: #ffffff;
}
.friend-link:hover::after {
    width: 100%;
}

/* ====== 底部版权区 ====== */
.footer-bottom {
    border-top: 1px solid var(--footer-border-color);
    background: var(--footer-bg-tertiary);
    position: relative;
}
.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(59, 130, 246, 0.3) 30%,
        rgba(6, 182, 212, 0.3) 70%,
        transparent 100%
    );
}

.footer-bottom-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px 32px;
}

.copyright {
    margin: 0;
    font-size: 13px;
    color: var(--footer-text-muted);
    text-align: center;
    line-height: 1.8;
}
.copyright a {
    color: var(--footer-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
}
.copyright a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--footer-accent-cyan);
    transition: width var(--transition-smooth);
}
.copyright a:hover {
    color: #ffffff;
}
.copyright a:hover::after {
    width: 100%;
}

/* ====== 回到顶部按钮 ====== */
.back-to-top-btn {
    position: fixed;
    right: 30px;
    bottom: 110px;
    z-index: 999;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--footer-accent-blue) 0%, var(--footer-accent-cyan) 100%);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    transition: all var(--transition-smooth);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(0.9);
}
.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.back-to-top-btn:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 8px 28px rgba(59, 130, 246, 0.55);
}
.back-to-top-btn:active {
    transform: translateY(-2px) scale(0.98);
}

/* ====== 响应式设计：平板（≤992px）===== */
@media (max-width: 992px) {
    .site-footer-new { font-size: 14px; }

    .footer-main { padding: 52px 0 40px; }
    .footer-main .container { padding: 0 24px; }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .branches-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .contact-card { padding: 24px; }
    .qrcode-item img { width: 110px; height: 110px; }

    .back-to-top-btn {
        right: 24px;
        bottom: 90px;
        width: 44px;
        height: 44px;
    }
}

/* ====== 响应式设计：手机（≤640px）===== */
@media (max-width: 640px) {
    :root {
        --footer-radius-sm: 6px;
        --footer-radius-md: 10px;
    }

    .site-footer-new { font-size: 13px; }

    .footer-main { padding: 36px 0 28px; }
    .footer-main .container { padding: 0 16px; }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    /* 移动端手风琴菜单 */
    .footer-nav-column .footer-links {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .footer-nav-column.expanded .footer-links {
        max-height: 400px;
    }

    .footer-column-title {
        margin-bottom: 14px;
        font-size: 14px;
        cursor: pointer;
        user-select: none;
        -webkit-tap-highlight-color: transparent;
    }

    .contact-card { padding: 20px; }
    .contact-card-title { margin-bottom: 18px; font-size: 14px; }
    .contact-body {
        flex-direction: row;
        align-items: center;
        gap: 20px;
    }
    .contact-list { gap: 10px; flex: 1; }
    .contact-item {
        font-size: 13px;
        padding: 10px 12px;
    }
    .qrcode-wrap {
        margin-top: 0;
        flex-shrink: 0;
    }
    .qrcode-item img { width: 90px; height: 90px; }
    .qrcode-item span { font-size: 11px; }

    .footer-branches-section { padding: 28px 0; }
    .branches-section-title { margin-bottom: 20px; font-size: 15px; }
    .branches-grid { grid-template-columns: 1fr; gap: 14px; }
    .branch-card { padding: 16px 18px; }
    .branch-header strong { font-size: 14px; }
    .branch-address { font-size: 12.5px; }

    /* 线下服务中心移动端隔离样式 */
    #branches-isolated { padding: 28px 0 !important; }
    #branches-isolated .branches-container { padding: 0 16px !important; }
    #branches-isolated .branches-section-title {
        margin-bottom: 20px !important;
        font-size: 15px !important;
        gap: 8px !important;
    }
    #branches-isolated .branches-grid {
        grid-template-columns: 1fr !important;
        gap: 14px !important;
    }
    #branches-isolated .branch-card {
        padding: 16px 18px !important;
    }
    #branches-isolated .branch-header strong {
        font-size: 14px !important;
    }
    #branches-isolated .branch-address {
        font-size: 12.5px !important;
    }

    .footer-friends { padding: 18px 0; }
    .footer-friends .container { padding: 0 16px; }
    .friends-label { font-size: 12px; }
    .friend-link { font-size: 12px; }

    .footer-bottom-content { padding: 16px; }
    .copyright { font-size: 12px; line-height: 1.75; }

    .back-to-top-btn {
        right: 16px;
        bottom: 70px;
        width: 42px;
        height: 42px;
        font-size: 16px;
    }
}

/* ====== 打印样式优化 ====== */
@media print {
    .site-footer-new {
        background: #ffffff !important;
        color: #000000 !important;
        border-top: 2px solid #000000;
    }
    .back-to-top-btn { display: none !important; }
    .contact-card { border: 1px solid #cccccc !important; }
}

/* ====== 高对比度模式支持 ====== */
@media (prefers-contrast: high) {
    :root {
        --footer-text-primary: #ffffff;
        --footer-text-secondary: #e5e7eb;
        --footer-text-muted: #d1d5db;
        --footer-border-color: rgba(255, 255, 255, 0.25);
    }
}

/* ====== 减少动效模式支持 ====== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}